If all bitcointalk community turn your power into manipulation, this can be possible, but hard!
And this is illegal, better stay clean
Let me tell you this ,it is not illegal to manipulate the price of any crypto currency as it is not monitored or run by any central authority and that is the best part when it comes to speculation and trading as you can make the most when you could manipulate the market and get away with it

.
Yeah and it's the beauty of bitcoins that each and everyone of us who even holds like 0.01 bitcoins do manipulate the price of bitcoins.
Wonder how ? Because if someone has 0.01 bitcoins and he fills a order on an exchange with that that means he lowered the price a bit. Actually this manipulation is what a lot of whales play with, and quite easily squeeze some nice profit.